Abstract
In an attempt to determine what types of sensory information are processed by the feedback mechanisms used to monitor speech production, the accuracy and duration of the speech production of 22 Ss was assessed when auditory feedback was undelayed or delayed (.197 sec. delay), and undistorted or distorted, either by “infinite” peak clipping or by differentiation followed by “infinite” peak clipping and integration. It was found that the degree to which speech was disrupted under delayed auditory feedback (DAF) could not be accounted for by the intelligibility of the auditory feedback. The results suggested that speech was maximally disrupted under DAF when the auditory feedback not only was highly intelligible but also contained information about the amplitude variation of the effector output (speech).
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